This work reports on the measurement of magnetic dichroism in angular-resolved photoelectron spectroscopy from in-plane magnetized buried thin films. The high bulk sensitivity of hard X-ray photoelectron spectroscopy (HAXPES) in combination with circularly polarized radiation enables the investigation of the magnetic properties of buried layers. Angular distributions of high kinetic energy (7 to 8 keV) photoelectrons in a range of about 60 deg were recorded in parallel to the energy distribution. Depending on purpose, energy and angular resolutions of 150 to 250 meV and 0.17 to 2 deg can be accomplished simultaneously in such experiments. Experiments were performed on exchange-biased magnetic layers covered by thin oxide films. More specifically, the angular distribution of photoelectrons from the ferromagnetic layer Co2FeAl layer grown on MnIr exchange-biasing layer was investigated where the magnetic structure is buried beneath a MgO layer. Pronounced magnetic dichroism is found in the Co and Fe 2p states for all angles of emission. A slightly increased magnetic dichroism was observed for normal emission in agreement with theoretical considerations.
@article{arxiv.1210.4374,
title = {Magnetic dichroism in angular resolved hard X-ray photoelectron spectroscopy from buried magnetic layers},
author = {Carlos E. ViolBarbosa and Siham Ouardi and Gerhard H. Fecher and Daniel Ebke and Claudia Felser},
journal= {arXiv preprint arXiv:1210.4374},
year = {2012}
}
Comments
arXiv admin note: substantial text overlap with arXiv:1106.4976